Jack-base



H. L BENEDICT.

JACK BASE.

APPLICATION FILED DEC. 7, 191 8.

1,328, 1 1 5 Patented Jan. 18,1920.

INVENTOR 76 1 9 I I g HZBeneaZwb WITNESSES A TTOR/VEYS HENRY BENEDICT, OF NEW ORLEANS, LOUISIANA.

JACK-BASE.

Specification of Letters Patent.

Patented Jan. 13, 1920.

Application filed December 7, 1918. Serial No. 265,780.

To all whom it may concern:

Be it known that I, HENRY I. BENEDICT, a citizen of the United States, and a resident of New Orleans, in the parish of Orleans and State of Louisiana, have invented anew and Improved J ack-Base, of which the following is a full, clear, and exact description.

This invention relates to lifting jacks for automobile and other uses, and the invention has for its general objects to improve the construction and operation of devices of this character so as to be reliable and efficient in use, easily and quickly adjusted and of durable and substantial design.

A more specific object of the invention is the provision of a jack in which the lifting element is capable of being easily and quickly set to any desired position with respect to the load, and then operated by a iiragk or equivalent means for lifting the Another specific object of the invention is the provision of a novel form of base and barrel adjustably mounted therein, whereby the height of the jack can be varied within comparatively wide limits, so that the jack is adaptable for high or low axles or other loads.

In the accompanying drawing:

Figure 1 is a central vertical section of a jack and base embodying the invention, part being shown in elevation.

Fig. 2 is a transverse section through Fig.

1 on line 2-2, same being on a reduced scale.

Referring to the accompanying drawing by numerals, 1 indicates a base in which one end of a barrel 2 is positioned, said barrel carrying the lifting elements 3, said lifting element being of any desired kind as for instance a worm 4 meshing with a worm wheel 5 which in turn meshes with the threads 6 on the lifting element 7. The base 1 comprises a vertically disposed tubular body 8 having a bottom flange 9 to provide a suitable supporting surface for the jack. Arranged preferably at the top of the tubular body 8 is a flange 10 which is mutilated or provided with a number of notches 11. These notches are to accommodate the lugs 12 extending from the barrel 2. there being one recess or notch 11 for each projection 12. The barrel 2 is of such diameter as to slide in the flange 10 as well as in the tubular body 8 when the lugs 12 are in registry with the openings 11. By moving the barrel 2 up and down while the lugs are in alinement with the openings or recesses 11 the effective height of the jack can be varied and when the desired height is attained the barrel 2 is turned with respect to the base to throw the lugs or projections 12 out of alinement with the recesses or openings 11 as shown in Fig. 2, wherein two recesses and two lugs are disclosed. To hold the barrel 2 in place in this adjusted position the upper part of the tubular body 8 is rendered resilient by reason of a vertical slit 13 at which slit are lugs 11 through which passes a clamping bolt 15 so as to contract the upper end of the base and clamp it to the barrel 2. To prevent the barrel from being entirely withdrawn from the base it is provided with an enlargement or flange 16 at its lower end so as to interlock with the flange 10 of the tubular body 8. This flange 16 also acts in a certain capacity as a fulcrum for preventing any appreciable swaying movement of the upper part of the barrel 2 when elevated, as the flange will engage the bodv 8 when moved slightly in a direction substantially transversely :of body 8.

The lifting element or screw 7 isloosely mounted in the barrel 2 so as to freely slide therein and the threads 6 are made preferably of an appreciable size so as to provide ample bearing surface on the barrel in order to move away from the driving wheel. The flange 17 on the lifting element will prevent the a cidental removal of the lifting element 7 as it will engage the gear 5 when moved a predetermined distance.

In operation the effective length of the entire jack is adjusted so as to be as high as possible, as low as possible, or in some intermediate position according to the article to be lifted and then the barrel 2 is clamped in place by an operation of the handle 18 0f the bolt or threaded member 15. The operating member 3 is then rotated for rotating the worm 4 which is in mesh with the worm wheel 5. and which in turn acts on the lifting element 7 for raising the same and also the object being operated upon. The operation of member 3 in one direction will cause the element 7 to be raised, when moved in the opposite direction wi ause the same to be lowered.

What I claim is:

1. A lifting jack comprising a base formed with a tubular body having an internal flange, said flange having a recess or opening, a barrel vertically movable in the base formed With a plurality of lugs spaced apart axially of the barrel proportioned to pass through said recess in said flange for engaging any lug with the top of the base by relative turning of the base and barrel, a lifting element telescopically fitting in the barrel, and means .for operating said lifting element. 7 V

2. A lifting jack comprising a base formed with a tubular body having an internal flange near the top, said flange having a recess, a barrel vertically movable of the base and having a plurality of plugs spaced apart axially of the barrel and the lugs being so proportioned as to pass through the recess of said flange for engaging any lug with the top of the base by relative turning of the base, a lifting element telescopically fitting in said barrel, and means carried by said barrel for operating the lifting element.

v3. A lifting jack 1 comprising a base formed with a tubular body having an internal flange, said flange having a recess, said body being split from the top downwardly toward the bottom of the. base for producing a resilient upper portion, a rotatable member for contracting the upper part of said base, a barrel vertically movable in the base having a plurality of lugs spaced apart axially of the barrel, said lugs being so proportioned as to pass through the recess of said flange for engaging any lug at the top of the base by rel'ativeturning of the base, said rotatable means for contracting the upper part of said base causing the base to grip said barrel and prevent, any movement thereof, a lifting element carried by the barrel, and means for operating said lifting element. V

HENRY I. BENEDICT. 

